Shifted Known Symbol Padding for Efficient Data Communication in a WLAN Context

To allow for a computationally efficient equalization scheme for the frequency selective transmission channels encountered in Wireless Local Area Network (WLAN) applications, Cyclic Prefix (CP) block transmission schemes have been proposed, such as Single-CarrierCP (SC-CP) and Multi-CarrierCP (MC-CP) transmission, also known as Orthogonal Frequency Division Multiplexing (OFDM). In this paper, however, the authors focus on the Known Symbol Padding (KSP) transmission scheme. In this scheme known padded sequences can be exploited for synchronization as well as for channel estimation. However, to simultaneously allow for low-complexity frequency-domain equalization and accurate channel estimation within the KSP context, a modified KSP scheme is proposed, namely Shifted KSP (S-KSP).